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1.分解因式:(x-y-z)(x+y-z)-(y-z-x)(y+z-x)

题目详情
1.分解因式:
(x-y-z)(x+y-z)-(y-z-x)(y+z-x)
▼优质解答
答案和解析
(x-y-z)(x+y-z)-(y-z-x)(y+z-x)
=(x-z-y)(x-z+y)-(y-x-z)(y-x+z)
=(x-z)^2-y^2-(y-x)^2+z^2
=(x-z)^2-(y-x)^2+z^2-y^2
=(x-z+y-x)(x-z-y+x)+(z-y)(z+y)
=(y-z)(2x-z-y)-(y-z)(z+y)
=2(y-z)(x-y-z)
这个是正确答案!